%0 Journal Article
%T Can phosphate compounds be used to reduce the plant uptake of Pb and resist the Pb stress in Pb-contaminated soils?<br>Can phosphate compounds be used to reduce the plant uptake of Pb and resist the Pb stress in Pb-contaminated soils
%A CHEN Shibao
%A CHEN Li
%A MA Yibing
%A HUANG Yizong
%A <br>CHEN Shibao
%A CHEN Li
%A MA Yibing
%A HUANG Yizong
%J 环境科学学报(英文版)
%D 2009
%I 
%X The effects of different phosphate-amendments on lead (Pb) uptake, the activities of superoxide dismutase (SOD) and the level of malondialdehyde (MDA) in cauliflower (Brassica oleracea L.) in contaminated soils with 2 500, 5 000 mg P2O5/kg soil of hydroxyapatite (HA), phosphate rock (PR), single-superphosphate (SSP) and the mix of HA/SSP (HASSP) were applied in pot experiments. Results showed that the Pb concentration in the shoots and roots was decreased in 18.3%-51.6% and 16.8%-57.3% among the treatments respectively compared to the control sample. The efficiency order of these phosphate amendments in reducing Pb uptake was followed as: HASSP≈ HA > SSP ≈ PR. With the addition of SSP, HA and the mix of HA/SSP, the SOD activity in the shoots was markedly reduced (P < 0.05) compared with that in control group, for example, the SOD activities in the shoots by the treatments of HASSP, SSP, and HA in 5 000 mg P2O5/kg were found to be only 51.3%, 56.2%, and 56.7%, respectively. The similar effects were also observed on the level of MDA in the shoots with the decrease in 24.5%-56.3%. The results verified the inference that phosphate compounds could be used to reduce the plant uptake of Pb and resist the Pb stress in the plant vegetated in Pb-contaminated soils.
%K phosphate amendments
%K lead
%K superoxide dismutase (SOD)
%K malondialdehyde (MDA)
%K contaminated soil<br>植物吸收
%K 污染土壤
%K 铅污染
%K 磷酸盐
%K 铅胁迫
%K 化合物
%K 超氧化物歧化酶活性
%K 过磷酸钙
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=3650691F3C0416163B31504058F93C8B&yid=DE12191FBD62783C&vid=659D3B06EBF534A7&iid=38B194292C032A66&sid=5DCBAAB000A70168&eid=683005D16807E4FE&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=4&reference_num=28